Install ++ apps with computer
1) Download cydia impactor application on your computer from that page:
2) Download the application from the same page that you'd like to install
3) Open cydia impactor and connect your device to the computer
4) Drag and drop the ++app onto Cydia impactor window
5) Click "start" button in cydia impactor
6) Provide a valid Apple ID to generate a developer certificate to install apps
Keep in mind that your data only goes to Apple,not to us or anybody else !
7) Provide a password and click ok
8) Click allow connection if it will ask,the rest of the steps will take place on your device
Visit that page to fix "Untrusted developerUntrustedDev"
*You need to redo that procedure every week in order to have it working